Embodiments are directed to a speaker system that contains multiple low frequency speakers distributed within a room. Each speaker has at least one driver capable of adequate bass response and an integrated microphone and on-board power and digital signal processing capability. The system has a central sound processor that performs a measurement and calibration process for all of the speakers in the room by receiving test signals from the speakers, measuring certain audio characteristics, deriving audio processing coefficients to smooth the bass response, and transmitting the respective coefficients to each speaker for application to the input audio signals for playback.

Systems and methods for adjusting bass levels of a multi-channel audio signal include, among other features, (i) receiving the multi-channel signal via a playback device; (ii) separating, from the multi-channel signal, low-frequency signals comprising frequencies less than a threshold frequency; (iii) determining electrical energies of the low-frequency signals; (iv) determining a first energy by summing the electrical energies of the low-frequency signals; (v) consolidating the low-frequency signals into a consolidated low-frequency signal; (vi) determining a second energy by determining an electrical energy of the consolidated low-frequency signal; (vii) generating a gain-adjusted low-frequency signal by adjusting a gain of the consolidated low-frequency signal based on both (a) the first energy and (b) the second energy; (viii) generating a gain-adjusted multi-channel signal by mixing the gain-adjusted low-frequency signal back into the multi-channel signal; and (ix) using the gain-adjusted multi-channel signal to play back gain-adjusted multi-channel audio content via the playback device.

A bass management system and method for mitigating bass management errors by using explicit information available in the object audio rendering process and deriving the correct subwoofer contribution for each audio object. Embodiments of the bass management system and method are used to maintain the correct balance of the bass reproduced by the subwoofer relative to the sound coming out of the other speakers. The system and method are useful for a variety of different speaker configurations, including speaker configurations having different speaker sub-zones. Power-normalized gain coefficients for each speaker are combined and the power of the combined gain coefficients is computed and used to obtain a power-preserving subwoofer contribution coefficient. This subwoofer contribution coefficient is applied to the bass portion of the audio signal and audio objects to determine the contribution of a particular subwoofer.

Disclosed are a multi-channel audio signal processing method and a multi-channel audio signal processing apparatus. The multi-channel audio signal processing method may generate N channel output signals from N/2 channel downmix signals based on an NN/2N structure.

The systems and methods described herein relate to, among other things, a transducer capable of producing acoustic and tactile stimulation. The transducer includes a rigid mass element disposed on the diaphragm of a speaker. The mass element may optionally be removable and may have a mass selected such that the resonant frequency of the transducer falls within the range of frequencies present in an input electrical audio signal. The systems and methods advantageously benefits from both the fidelity and audio performance of a full-range speaker while simultaneously producing high-fidelity, adjustable and palpable haptic vibrations.

A system is provided herein that includes a hub and one or more speakers in communication with the hub and configured to transmit one or more filter parameters to the hub. The hub is configured to filter audio that is output to each respective speaker using the one or more filter parameters. A speaker selector module is configured to allow a user to select a slot based on a position of each respective speaker. The hub is operable to transmit audio signals to each of the one or more speakers as a function of the slot setting.

Systems and methods are provided for personalized three-dimensional audio. In one embodiment, a sound calibration system comprises a headrest having a first speaker, a second speaker, and one or more sensors, the headrest configured to engage a head of a user, and a controller with computer readable instructions stored on non-transitory memory. The instructions, when executed, cause the controller to create customized spatial audio by utilizing a head-related impulse response (HRIR) that is modified based on an input audio signal, the location of the audio source and receiver, and the head position of the user. The resulting audio output is generated by applying the HRIR and interaural crosstalk cancellation filters to frequencies above a threshold frequency.

A system and method that incorporates the subject disclosure may include, for example, receiving a multichannel audio stream; forming a front channel audio stream of the multichannel audio stream, including combining a first subset of audio channels of the multichannel audio stream to form the front channel audio stream; forming a surround channel audio stream of the multichannel audio stream including combining a second subset of audio channels of the multichannel audio stream to form the surround channel audio stream; providing the front channel audio stream to a primary set of speakers positioned in front of a listener and providing the surround channel audio stream to a supplemental speaker positioned behind the listener; and synchronizing the front channel audio stream and the surround channel audio stream. Additional embodiments are disclosed.

Example embodiments relate to an apparatus, method and computer program for output of stereo or spatial audio. The method may for example comprise providing first data representing stereo or spatial audio, providing second data representing other audio and determining an orientation and/or configuration of an apparatus. The method may also comprise outputting the first data to selected first and second loudspeakers of the apparatus, comprising at least three loudspeakers based, at least in part, on the orientation and/or configuration of the apparatus; and outputting the second data to at least a third loudspeaker of the at least three loudspeakers other than the first and second loudspeakers.

A virtual bass generating circuit used in a speaker is used to filter out a high frequency part of an audio signal to generate a low passed audio signal, generates an even and odd audio signals respectively having even and odd harmonics of the low passed audio signal according to the low passed audio signal, subtracts an amplified low passed audio signal from an addition of an amplified even audio signal and an amplified odd audio signal to generate a first calculated audio signal, filters out a low frequency part and a high frequency part of the first calculated audio signal to generate a band passed audio signal, and adds the band passed audio signal and the audio signal to generate a second calculated audio signal with enhanced even and odd harmonics of the audio signal.